On March 30, Source Music confirmed that HYBE Labels founder Bang Si Hyuk will serve as the head producer for LE SSERAFIM's debut project. 

Also known as Hitman Bang, Bang Si Hyuk is well-known as the producing mastermind behind BTS, TOMORROW x TOGETHER, and ENHYPEN. Now, Bang Si Hyuk will be working closely with Source Music toward the success of the first girl group launched by HYBE Labels. Under Bang Si Hyuk's production and direction, the new girl group is expected to showcase an inventive storyline, high quality music and performances, plus more.

Meanwhile, LE SSERAFIM consist of 6-members, including former IZ*ONE members Miyawaki Sakura and Kim Chae Won. The team is expected to begin revealing its member lineup in the first week of April, ahead of their full debut in May.